There are unfortunately no direct flights from NYC to RTB.
You either have to stop in Florida, Texas, or the cheapest flights we've found were on Avianca stopping in San Salvador.
I find the best prices for flights on trip advisor and Hopper.
Expedia will not show flights on Avianca.
Book your flight ahead of time for the best price.
We can either arrange accommodations onboard or recommend local places to stay.
Looking forward to seeing you all down there!